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Loss of torque after Gov Mod.
by
shwak23
on 15 May, 2013 15:44
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I posted this in the governor mod thread with little response. I feel like this is a fairly common problem.
That is a relation on how you have your external settings set up. I once had my 1.6 NA setup with a fully shimmed governor and I could get in to fifth gear without ever touching the accelerator.
Literally, could idle through every gear and not stall it out. So no the gov mod is not causing this.
Lets discuss this more. I have this same problem. After GOV mod it seems like I lack torque when taking off in first gear. I doubt fuel needs to be turned up. It smokes black at full throttle. And always spews a little haze.
Sent from Outer Space! [/quote]
Sent from Outer Space!
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#1
by
shwak23
on 16 May, 2013 16:31
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Could this be a problem with the ecu? My uncles mailman said there was a torque screw... I can't find it though. He said it was on the in tank fuel pump. Will mixing a little gasoline in the fuel help? Off topic question... can I install independent throttle bodies that work with the injection pump?
Sent from Outer Space!
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#2
by
theman53
on 16 May, 2013 18:04
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If it is for your 1990 golf then it doesn't have an ECU. Also throttle bodies will not help a diesel engine that draws 100% air.
What I see happen is the top plate is not a high tolerance fit. It is not to the nearest .1" even. The ones I have had open have quite a bit of slop. If your cover moved say even .1" away from the cam belt and the fuel screw did not *from original positions* then you will be injecting less fuel than you were previously to the gov. mod.
There is no in tank fuel pump in your car either.
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#3
by
libbydiesel
on 16 May, 2013 18:51
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I'm pretty sure all of his second post is tongue in cheek to bump the thread.
Perhaps your pump is equipped with load dependent timing advance and doing the governor mod has changed the accelerator position for a given fueling enough that the load/timing isn't set up correctly.
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#4
by
wolf_walker
on 16 May, 2013 19:06
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The one, brief time I tried it I felt the same. Years ago and I haven't tried again since. Listening though.
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#5
by
92EcoDiesel Jetta
on 16 May, 2013 20:23
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I posted this in the governor mod thread with little response. I feel like this is a fairly common problem.
Lets discuss this more. I have this same problem. After GOV mod it seems like I lack torque when taking off in first gear. I doubt fuel needs to be turned up. It smokes black at full throttle. And always spews a little haze.
Sent from Outer Space!
Sent from Outer Space!
I also had the low torque first gear problem after the governor mod. . you have to re- index the throttle shaft one notch at a time till you get your torque back
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#6
by
wolf_walker
on 16 May, 2013 20:38
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Even if the idle is normal still?
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#7
by
shwak23
on 16 May, 2013 21:19
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I posted this in the governor mod thread with little response. I feel like this is a fairly common problem.
Lets discuss this more. I have this same problem. After GOV mod it seems like I lack torque when taking off in first gear. I doubt fuel needs to be turned up. It smokes black at full throttle. And always spews a little haze.
Sent from Outer Space!
Sent from Outer Space!
I also had the low torque first gear problem after the governor mod. . you have to re- index the throttle shaft one notch at a time till you get your torque back
Yeah that doesn't seem right. I thought things get rather loopy when you are off by even one notch.
Sent from Outer Space!
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#8
by
shwak23
on 16 May, 2013 21:21
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I'm pretty sure all of his second post is tongue in cheek to bump the thread.
Perhaps your pump is equipped with load dependent timing advance and doing the governor mod has changed the accelerator position for a given fueling enough that the load/timing isn't set up correctly.
Stupid questions about ecus and in tank pumps get responses really fast.
I bought my pump from a guy on here. Let me dig up what modifications he did to it so we can see what we are working with.
Sent from Outer Space!
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#9
by
shwak23
on 17 May, 2013 15:12
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Fully shimmed governor and some dynamic timing advance.
Sent from Outer Space!
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#10
by
92EcoDiesel Jetta
on 17 May, 2013 16:24
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Even if the idle is normal still?
idle was low because throttle shaft was indexed wrong. I tried to compensate by turning up idle speed screw, which did raise the idle but produced low first gear torque. the only way I was able to get first gear torque back was to reindex throttle shaft. it was a p.i.t.a to drive like that.
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#11
by
wolf_walker
on 18 May, 2013 12:40
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My idle wasn't low, still low torque at low rpm. As I recall anyway, been awhile.
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#12
by
shwak23
on 19 May, 2013 00:11
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Even if the idle is normal still?
idle was low because throttle shaft was indexed wrong. I tried to compensate by turning up idle speed screw, which did raise the idle but produced low first gear torque. the only way I was able to get first gear torque back was to reindex throttle shaft. it was a p.i.t.a to drive like that.
Do you recall how much and in what direction you changed it?
Sent from Outer Space!
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#13
by
92EcoDiesel Jetta
on 19 May, 2013 05:21
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Even if the idle is normal still?
idle was low because throttle shaft was indexed wrong. I tried to compensate by turning up idle speed screw, which did raise the idle but produced low first gear torque. the only way I was able to get first gear torque back was to reindex throttle shaft. it was a p.i.t.a to drive like that.
Do you recall how much and in what direction you changed it?
Sent from Outer Space!
in the direction you want to increase throttle. how much? by trial and error.
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#14
by
shwak23
on 19 May, 2013 19:27
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Ok so turns out you were all correct. It was the throttle arm. To think I have been driving around for months like this. The spot where it was and the spot where it is now are one tooth off. It was hard to tell they were even different which is why I think the member on here messed it up. Honest mistake. But boy does it make a huge difference in the power I have in first gear now.
So I would say if you have done the governor mod and lost torque. This was your problem. I drove the car for months in the wrong spot and for the most part it seemed fine.
Wolf walker... I highly suggest you give this another try.
Sent from Outer Space!